#define _CRT_SECURE_NO_WARNINGS 1
int main()
{
    int x, y, x1, y1;
    scanf("%d %d", &x, &y);
    scanf("%d %d", &x1, &y1);
    if (x1 == x)
        y1 > y ? printf("u") : printf("d");
    else
        x1 > x ? printf("r") : printf("l");
    return 0;
}
